Photographic reconstruction of a spinal cord section stained with cresyl violet and observed with the objective of 4x. We can observe the gray matter, formed by numerous neurons (in form of “H”), and around it is located the white matter. Within the gray matter the neurons are distributed in dorsal and ventral horns. The ependyma can be seen in the center of the microphotogray. Details of these structures are offered at higher magnification in other microphotographies (zone framed in red)